There's no concrete timeline for this, but Nick and I talked about it in depth yesterday and we think we've figured out everything that needs to be done. Bugs in the "depends on" field are hard blockers. The following are nice to haves: bug 671485 bug 791336 bug 820507 bug 884563 bug 884662 bug 921458 bug 739241 bug 932787
We flipped the switch live yesterday, so clearly this is fixed. While some blockers remain open, it is because they're waiting for better fixes, or also block shipping Balrog to release users.